After a brief introduction to viruses and their characteristics, here we are more specifically interested in Coronaviruses and the origins of SARSCoV2 as well as its genetic lineage. From the study of the abundant international literature existing on the question, as well as a thesis and a dissertation in Chinese medicine describing severe atypical pneumopathies in people who worked in a mine infested by bats in southern China (Mojiang, Yunnan, 2012), it appears that the virus extracted from this mine could have played a role in the birth of the pandemic. Originally named by the Wuhan Virological Institute (WIV) with the acronym RaBtCoV/4991, it was later renamed RaTG-13 and presented, without this identity being reported, in a WIV publicat...